/*
- * Go2Webinar decoder
+ * Go2Webinar / Go2Meeting decoder
* Copyright (c) 2012 Konstantin Shishkov
+ * Copyright (c) 2013 Maxim Poliakovski
*
* This file is part of FFmpeg.
*
/**
* @file
- * Go2Webinar decoder
+ * Go2Webinar / Go2Meeting decoder
*/
#include <inttypes.h>
#include "avcodec.h"
#include "blockdsp.h"
#include "bytestream.h"
+#include "elsdec.h"
#include "get_bits.h"
#include "idctdsp.h"
#include "internal.h"
#include "jpegtables.h"
#include "mjpeg.h"
+#define EPIC_PIX_STACK_SIZE 1024
+#define EPIC_PIX_STACK_MAX (EPIC_PIX_STACK_SIZE - 1)
+
enum ChunkType {
DISPLAY_INFO = 0xC8,
TILE_DATA,
50, 50, 50, 50, 50, 50, 50, 50,
};
+typedef struct ePICPixListElem {
+ struct ePICPixListElem *next;
+ uint32_t pixel;
+ uint8_t rung;
+} ePICPixListElem;
+
+typedef struct ePICPixHashElem {
+ uint32_t pix_id;
+ struct ePICPixListElem *list;
+} ePICPixHashElem;
+
+#define EPIC_HASH_SIZE 256
+typedef struct ePICPixHash {
+ ePICPixHashElem *bucket[EPIC_HASH_SIZE];
+ int bucket_size[EPIC_HASH_SIZE];
+ int bucket_fill[EPIC_HASH_SIZE];
+} ePICPixHash;
+
+typedef struct ePICContext {
+ ElsDecCtx els_ctx;
+ int next_run_pos;
+ ElsUnsignedRung unsigned_rung;
+ uint8_t W_flag_rung;
+ uint8_t N_flag_rung;
+ uint8_t W_ctx_rung[256];
+ uint8_t N_ctx_rung[512];
+ uint8_t nw_pred_rung[256];
+ uint8_t ne_pred_rung[256];
+ uint8_t prev_row_rung[14];
+ uint8_t runlen_zeroes[14];
+ uint8_t runlen_one;
+ int stack_pos;
+ uint32_t stack[EPIC_PIX_STACK_SIZE];
+ ePICPixHash hash;
+} ePICContext;
+
typedef struct JPGContext {
BlockDSPContext bdsp;
IDCTDSPContext idsp;
} JPGContext;
typedef struct G2MContext {
+ ePICContext ec;
JPGContext jc;
+
int version;
int compression;
uint8_t *framebuf;
int framebuf_stride, old_width, old_height;
- uint8_t *synth_tile, *jpeg_tile;
- int tile_stride, old_tile_w, old_tile_h;
+ uint8_t *synth_tile, *jpeg_tile, *epic_buf, *epic_buf_base;
+ int tile_stride, epic_buf_stride, old_tile_w, old_tile_h;
+ int swapuv;
uint8_t *kempf_buf, *kempf_flags;
return 0;
}
-static inline void yuv2rgb(uint8_t *out, int Y, int U, int V)
+static inline void yuv2rgb(uint8_t *out, int ridx, int Y, int U, int V)
{
- out[0] = av_clip_uint8(Y + ( 91881 * V + 32768 >> 16));
- out[1] = av_clip_uint8(Y + (-22554 * U - 46802 * V + 32768 >> 16));
- out[2] = av_clip_uint8(Y + (116130 * U + 32768 >> 16));
+ out[ridx] = av_clip_uint8(Y + (91881 * V + 32768 >> 16));
+ out[1] = av_clip_uint8(Y + (-22554 * U - 46802 * V + 32768 >> 16));
+ out[2 - ridx] = av_clip_uint8(Y + (116130 * U + 32768 >> 16));
}
static int jpg_decode_data(JPGContext *c, int width, int height,
int bx, by;
int unesc_size;
int ret;
+ const int ridx = swapuv ? 2 : 0;
if ((ret = av_reallocp(&c->buf,
src_size + FF_INPUT_BUFFER_PADDING_SIZE)) < 0)
int Y, U, V;
Y = c->block[(j >> 3) * 2 + (i >> 3)][(i & 7) + (j & 7) * 8];
- U = c->block[4 ^ swapuv][(i >> 1) + (j >> 1) * 8] - 128;
- V = c->block[5 ^ swapuv][(i >> 1) + (j >> 1) * 8] - 128;
- yuv2rgb(out + i * 3, Y, U, V);
+ U = c->block[4][(i >> 1) + (j >> 1) * 8] - 128;
+ V = c->block[5][(i >> 1) + (j >> 1) * 8] - 128;
+ yuv2rgb(out + i * 3, ridx, Y, U, V);
}
}
return 0;
}
+#define LOAD_NEIGHBOURS(x) \
+ W = curr_row[(x) - 1]; \
+ N = above_row[(x)]; \
+ WW = curr_row[(x) - 2]; \
+ NW = above_row[(x) - 1]; \
+ NE = above_row[(x) + 1]; \
+ NN = above2_row[(x)]; \
+ NNW = above2_row[(x) - 1]; \
+ NWW = above_row[(x) - 2]; \
+ NNE = above2_row[(x) + 1]
+
+#define UPDATE_NEIGHBOURS(x) \
+ NNW = NN; \
+ NN = NNE; \
+ NWW = NW; \
+ NW = N; \
+ N = NE; \
+ NE = above_row[(x) + 1]; \
+ NNE = above2_row[(x) + 1]
+
+#define R_shift 16
+#define G_shift 8
+#define B_shift 0
+
+/* improved djb2 hash from http://www.cse.yorku.ca/~oz/hash.html */
+static int djb2_hash(uint32_t key)
+{
+ uint32_t h = 5381;
+
+ h = (h * 33) ^ ((key >> 24) & 0xFF); // xxx: probably not needed at all
+ h = (h * 33) ^ ((key >> 16) & 0xFF);
+ h = (h * 33) ^ ((key >> 8) & 0xFF);
+ h = (h * 33) ^ (key & 0xFF);
+
+ return h & (EPIC_HASH_SIZE - 1);
+}
+
+static void epic_hash_init(ePICPixHash *hash)
+{
+ memset(hash, 0, sizeof(*hash));
+}
+
+static ePICPixHashElem *epic_hash_find(const ePICPixHash *hash, uint32_t key)
+{
+ int i, idx = djb2_hash(key);
+ ePICPixHashElem *bucket = hash->bucket[idx];
+
+ for (i = 0; i < hash->bucket_fill[idx]; i++)
+ if (bucket[i].pix_id == key)
+ return &bucket[i];
+
+ return NULL;
+}
+
+static ePICPixHashElem *epic_hash_add(ePICPixHash *hash, uint32_t key)
+{
+ ePICPixHashElem *bucket, *ret;
+ int idx = djb2_hash(key);
+
+ if (hash->bucket_size[idx] > INT_MAX / sizeof(**hash->bucket))
+ return NULL;
+
+ if (!(hash->bucket_fill[idx] < hash->bucket_size[idx])) {
+ int new_size = hash->bucket_size[idx] + 16;
+ bucket = av_realloc(hash->bucket[idx], new_size * sizeof(*bucket));
+ if (!bucket)
+ return NULL;
+ hash->bucket[idx] = bucket;
+ hash->bucket_size[idx] = new_size;
+ }
+
+ ret = &hash->bucket[idx][hash->bucket_fill[idx]++];
+ memset(ret, 0, sizeof(*ret));
+ ret->pix_id = key;
+ return ret;
+}
+
+static int epic_add_pixel_to_cache(ePICPixHash *hash, uint32_t key, uint32_t pix)
+{
+ ePICPixListElem *new_elem;
+ ePICPixHashElem *hash_elem = epic_hash_find(hash, key);
+
+ if (!hash_elem) {
+ if (!(hash_elem = epic_hash_add(hash, key)))
+ return AVERROR(ENOMEM);
+ }
+
+ new_elem = av_mallocz(sizeof(*new_elem));
+ if (!new_elem)
+ return AVERROR(ENOMEM);
+
+ new_elem->pixel = pix;
+ new_elem->next = hash_elem->list;
+ hash_elem->list = new_elem;
+
+ return 0;
+}
+
+static inline int epic_cache_entries_for_pixel(const ePICPixHash *hash,
+ uint32_t pix)
+{
+ ePICPixHashElem *hash_elem = epic_hash_find(hash, pix);
+
+ if (hash_elem != NULL && hash_elem->list != NULL)
+ return 1;
+
+ return 0;
+}
+
+static void epic_free_pixel_cache(ePICPixHash *hash)
+{
+ int i, j;
+
+ for (i = 0; i < EPIC_HASH_SIZE; i++) {
+ for (j = 0; j < hash->bucket_fill[i]; j++) {
+ ePICPixListElem *list_elem = hash->bucket[i][j].list;
+ while (list_elem) {
+ ePICPixListElem *tmp = list_elem->next;
+ av_free(list_elem);
+ list_elem = tmp;
+ }
+ }
+ av_freep(&hash->bucket[i]);
+ hash->bucket_size[i] =
+ hash->bucket_fill[i] = 0;
+ }
+}
+
+static inline int is_pixel_on_stack(const ePICContext *dc, uint32_t pix)
+{
+ int i;
+
+ for (i = 0; i < dc->stack_pos; i++)
+ if (dc->stack[i] == pix)
+ break;
+
+ return i != dc->stack_pos;
+}
+
+#define TOSIGNED(val) (((val) >> 1) ^ -((val) & 1))
+
+static inline int epic_decode_component_pred(ePICContext *dc,
+ int N, int W, int NW)
+{
+ unsigned delta = ff_els_decode_unsigned(&dc->els_ctx, &dc->unsigned_rung);
+ return mid_pred(N, N + W - NW, W) - TOSIGNED(delta);
+}
+
+static uint32_t epic_decode_pixel_pred(ePICContext *dc, int x, int y,
+ const uint32_t *curr_row,
+ const uint32_t *above_row)
+{
+ uint32_t N, W, NW, pred;
+ unsigned delta;
+ int GN, GW, GNW, R, G, B;
+
+ if (x && y) {
+ W = curr_row[x - 1];
+ N = above_row[x];
+ NW = above_row[x - 1];
+
+ GN = (N >> G_shift) & 0xFF;
+ GW = (W >> G_shift) & 0xFF;
+ GNW = (NW >> G_shift) & 0xFF;
+
+ G = epic_decode_component_pred(dc, GN, GW, GNW);
+
+ R = G + epic_decode_component_pred(dc,
+ ((N >> R_shift) & 0xFF) - GN,
+ ((W >> R_shift) & 0xFF) - GW,
+ ((NW >> R_shift) & 0xFF) - GNW);
+
+ B = G + epic_decode_component_pred(dc,
+ ((N >> B_shift) & 0xFF) - GN,
+ ((W >> B_shift) & 0xFF) - GW,
+ ((NW >> B_shift) & 0xFF) - GNW);
+ } else {
+ if (x)
+ pred = curr_row[x - 1];
+ else
+ pred = above_row[x];
+
+ delta = ff_els_decode_unsigned(&dc->els_ctx, &dc->unsigned_rung);
+ R = ((pred >> R_shift) & 0xFF) - TOSIGNED(delta);
+
+ delta = ff_els_decode_unsigned(&dc->els_ctx, &dc->unsigned_rung);
+ G = ((pred >> G_shift) & 0xFF) - TOSIGNED(delta);
+
+ delta = ff_els_decode_unsigned(&dc->els_ctx, &dc->unsigned_rung);
+ B = ((pred >> B_shift) & 0xFF) - TOSIGNED(delta);
+ }
+
+ if (R<0 || G<0 || B<0) {
+ av_log(NULL, AV_LOG_ERROR, "RGB %d %d %d is out of range\n", R, G, B);
+ return 0;
+ }
+
+ return (R << R_shift) | (G << G_shift) | (B << B_shift);
+}
+
+static int epic_predict_pixel(ePICContext *dc, uint8_t *rung,
+ uint32_t *pPix, uint32_t pix)
+{
+ if (!ff_els_decode_bit(&dc->els_ctx, rung)) {
+ *pPix = pix;
+ return 1;
+ }
+ dc->stack[dc->stack_pos++ & EPIC_PIX_STACK_MAX] = pix;
+ return 0;
+}
+
+static int epic_handle_edges(ePICContext *dc, int x, int y,
+ const uint32_t *curr_row,
+ const uint32_t *above_row, uint32_t *pPix)
+{
+ uint32_t pix;
+
+ if (!x && !y) { /* special case: top-left pixel */
+ /* the top-left pixel is coded independently with 3 unsigned numbers */
+ *pPix = (ff_els_decode_unsigned(&dc->els_ctx, &dc->unsigned_rung) << R_shift) |
+ (ff_els_decode_unsigned(&dc->els_ctx, &dc->unsigned_rung) << G_shift) |
+ (ff_els_decode_unsigned(&dc->els_ctx, &dc->unsigned_rung) << B_shift);
+ return 1;
+ }
+
+ if (x) { /* predict from W first */
+ pix = curr_row[x - 1];
+ if (epic_predict_pixel(dc, &dc->W_flag_rung, pPix, pix))
+ return 1;
+ }
+
+ if (y) { /* then try to predict from N */
+ pix = above_row[x];
+ if (!dc->stack_pos || dc->stack[0] != pix) {
+ if (epic_predict_pixel(dc, &dc->N_flag_rung, pPix, pix))
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+static int epic_decode_run_length(ePICContext *dc, int x, int y, int tile_width,
+ const uint32_t *curr_row,
+ const uint32_t *above_row,
+ const uint32_t *above2_row,
+ uint32_t *pPix, int *pRun)
+{
+ int idx, got_pixel = 0, WWneW, old_WWneW = 0;
+ uint32_t W, WW, N, NN, NW, NE, NWW, NNW, NNE;
+
+ *pRun = 0;
+
+ LOAD_NEIGHBOURS(x);
+
+ if (dc->next_run_pos == x) {
+ /* can't reuse W for the new pixel in this case */
+ WWneW = 1;
+ } else {
+ idx = (WW != W) << 7 |
+ (NW != W) << 6 |
+ (N != NE) << 5 |
+ (NW != N) << 4 |
+ (NWW != NW) << 3 |
+ (NNE != NE) << 2 |
+ (NN != N) << 1 |
+ (NNW != NW);
+ WWneW = ff_els_decode_bit(&dc->els_ctx, &dc->W_ctx_rung[idx]);
+ }
+
+ if (WWneW)
+ dc->stack[dc->stack_pos++ & EPIC_PIX_STACK_MAX] = W;
+ else {
+ *pPix = W;
+ got_pixel = 1;
+ }
+
+ do {
+ int NWneW = 1;
+ if (got_pixel) // pixel value already known (derived from either W or N)
+ NWneW = *pPix != N;
+ else { // pixel value is unknown and will be decoded later
+ NWneW = *pRun ? NWneW : NW != W;
+
+ /* TODO: RFC this mess! */
+ switch (((NW != N) << 2) | (NWneW << 1) | WWneW) {
+ case 0:
+ break; // do nothing here
+ case 3:
+ case 5:
+ case 6:
+ case 7:
+ if (!is_pixel_on_stack(dc, N)) {
+ idx = WWneW << 8 |
+ (*pRun ? old_WWneW : WW != W) << 7 |
+ NWneW << 6 |
+ (N != NE) << 5 |
+ (NW != N) << 4 |
+ (NWW != NW) << 3 |
+ (NNE != NE) << 2 |
+ (NN != N) << 1 |
+ (NNW != NW);
+ if (!ff_els_decode_bit(&dc->els_ctx, &dc->N_ctx_rung[idx])) {
+ NWneW = 0;
+ *pPix = N;
+ got_pixel = 1;
+ break;
+ }
+ }
+ /* fall through */
+ default:
+ NWneW = 1;
+ old_WWneW = WWneW;
+ if (!is_pixel_on_stack(dc, N))
+ dc->stack[dc->stack_pos++ & EPIC_PIX_STACK_MAX] = N;
+ }
+ }
+
+ (*pRun)++;
+ if (x + *pRun >= tile_width - 1)
+ break;
+
+ UPDATE_NEIGHBOURS(x + *pRun);
+
+ if (!NWneW && NW == N && N == NE) {
+ int pos, run, rle;
+ int start_pos = x + *pRun;
+
+ /* scan for a run of pix in the line above */
+ uint32_t pix = above_row[start_pos + 1];
+ for (pos = start_pos + 2; pos < tile_width; pos++)
+ if (!(above_row[pos] == pix))
+ break;
+ run = pos - start_pos - 1;
+ idx = av_ceil_log2(run);
+ if (ff_els_decode_bit(&dc->els_ctx, &dc->prev_row_rung[idx]))
+ *pRun += run;
+ else {
+ int flag;
+ /* run-length is coded as plain binary number of idx - 1 bits */
+ for (pos = idx - 1, rle = 0, flag = 0; pos >= 0; pos--) {
+ if ((1 << pos) + rle < run &&
+ ff_els_decode_bit(&dc->els_ctx,
+ flag ? &dc->runlen_one
+ : &dc->runlen_zeroes[pos])) {
+ flag = 1;
+ rle |= 1 << pos;
+ }
+ }
+ *pRun += rle;
+ break; // return immediately
+ }
+ if (x + *pRun >= tile_width - 1)
+ break;
+
+ LOAD_NEIGHBOURS(x + *pRun);
+ WWneW = 0;
+ NWneW = 0;
+ }
+
+ idx = WWneW << 7 |
+ NWneW << 6 |
+ (N != NE) << 5 |
+ (NW != N) << 4 |
+ (NWW != NW) << 3 |
+ (NNE != NE) << 2 |
+ (NN != N) << 1 |
+ (NNW != NW);
+ WWneW = ff_els_decode_bit(&dc->els_ctx, &dc->W_ctx_rung[idx]);
+ } while (!WWneW);
+
+ dc->next_run_pos = x + *pRun;
+ return got_pixel;
+}
+
+static int epic_predict_pixel2(ePICContext *dc, uint8_t *rung,
+ uint32_t *pPix, uint32_t pix)
+{
+ if (ff_els_decode_bit(&dc->els_ctx, rung)) {
+ *pPix = pix;
+ return 1;
+ }
+ dc->stack[dc->stack_pos++ & EPIC_PIX_STACK_MAX] = pix;
+ return 0;
+}
+
+static int epic_predict_from_NW_NE(ePICContext *dc, int x, int y, int run,
+ int tile_width, const uint32_t *curr_row,
+ const uint32_t *above_row, uint32_t *pPix)
+{
+ int pos;
+
+ /* try to reuse the NW pixel first */
+ if (x && y) {
+ uint32_t NW = above_row[x - 1];
+ if (NW != curr_row[x - 1] && NW != above_row[x] && !is_pixel_on_stack(dc, NW)) {
+ if (epic_predict_pixel2(dc, &dc->nw_pred_rung[NW & 0xFF], pPix, NW))
+ return 1;
+ }
+ }
+
+ /* try to reuse the NE[x + run, y] pixel */
+ pos = x + run - 1;
+ if (pos < tile_width - 1 && y) {
+ uint32_t NE = above_row[pos + 1];
+ if (NE != above_row[pos] && !is_pixel_on_stack(dc, NE)) {
+ if (epic_predict_pixel2(dc, &dc->ne_pred_rung[NE & 0xFF], pPix, NE))
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+static int epic_decode_from_cache(ePICContext *dc, uint32_t W, uint32_t *pPix)
+{
+ ePICPixListElem *list, *prev = NULL;
+ ePICPixHashElem *hash_elem = epic_hash_find(&dc->hash, W);
+
+ if (!hash_elem || !hash_elem->list)
+ return 0;
+
+ list = hash_elem->list;
+ while (list) {
+ if (!is_pixel_on_stack(dc, list->pixel)) {
+ if (ff_els_decode_bit(&dc->els_ctx, &list->rung)) {
+ *pPix = list->pixel;
+ if (list != hash_elem->list) {
+ prev->next = list->next;
+ list->next = hash_elem->list;
+ hash_elem->list = list;
+ }
+ return 1;
+ }
+ dc->stack[dc->stack_pos++ & EPIC_PIX_STACK_MAX] = list->pixel;
+ }
+ prev = list;
+ list = list->next;
+ }
+
+ return 0;
+}
+
+static int epic_decode_tile(ePICContext *dc, uint8_t *out, int tile_height,
+ int tile_width, int stride)
+{
+ int x, y;
+ uint32_t pix;
+ uint32_t *curr_row = NULL, *above_row = NULL, *above2_row;
+
+ for (y = 0; y < tile_height; y++, out += stride) {
+ above2_row = above_row;
+ above_row = curr_row;
+ curr_row = (uint32_t *) out;
+
+ for (x = 0, dc->next_run_pos = 0; x < tile_width;) {
+ if (dc->els_ctx.err)
+ return AVERROR_INVALIDDATA; // bail out in the case of ELS overflow
+
+ pix = curr_row[x - 1]; // get W pixel
+
+ if (y >= 1 && x >= 2 &&
+ pix != curr_row[x - 2] && pix != above_row[x - 1] &&
+ pix != above_row[x - 2] && pix != above_row[x] &&
+ !epic_cache_entries_for_pixel(&dc->hash, pix)) {
+ curr_row[x] = epic_decode_pixel_pred(dc, x, y, curr_row, above_row);
+ x++;
+ } else {
+ int got_pixel, run;
+ dc->stack_pos = 0; // empty stack
+
+ if (y < 2 || x < 2 || x == tile_width - 1) {
+ run = 1;
+ got_pixel = epic_handle_edges(dc, x, y, curr_row, above_row, &pix);
+ } else
+ got_pixel = epic_decode_run_length(dc, x, y, tile_width,
+ curr_row, above_row,
+ above2_row, &pix, &run);
+
+ if (!got_pixel && !epic_predict_from_NW_NE(dc, x, y, run,
+ tile_width, curr_row,
+ above_row, &pix)) {
+ uint32_t ref_pix = curr_row[x - 1];
+ if (!x || !epic_decode_from_cache(dc, ref_pix, &pix)) {
+ pix = epic_decode_pixel_pred(dc, x, y, curr_row, above_row);
+ if (x) {
+ int ret = epic_add_pixel_to_cache(&dc->hash,
+ ref_pix,
+ pix);
+ if (ret)
+ return ret;
+ }
+ }
+ }
+ for (; run > 0; x++, run--)
+ curr_row[x] = pix;
+ }
+ }
+ }
+
+ return 0;
+}
+
+static int epic_jb_decode_tile(G2MContext *c, int tile_x, int tile_y,
+ const uint8_t *src, size_t src_size,
+ AVCodecContext *avctx)
+{
+ uint8_t prefix, mask = 0x80;
+ int extrabytes, tile_width, tile_height, awidth, aheight;
+ size_t els_dsize;
+ uint8_t *dst;
+
+ if (!src_size)
+ return 0;
+
+ /* get data size of the ELS partition as unsigned variable-length integer */
+ prefix = *src++;
+ src_size--;
+ for (extrabytes = 0; (prefix & mask) && (extrabytes < 7); extrabytes++)
+ mask >>= 1;
+ if (extrabytes > 3 || src_size < extrabytes) {
+ av_log(avctx, AV_LOG_ERROR, "ePIC: invalid data size VLI\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ els_dsize = prefix & ((0x80 >> extrabytes) - 1); // mask out the length prefix
+ while (extrabytes-- > 0) {
+ els_dsize = (els_dsize << 8) | *src++;
+ src_size--;
+ }
+
+ if (src_size < els_dsize) {
+ av_log(avctx, AV_LOG_ERROR, "ePIC: data too short, needed %zu, got %zu\n",
+ els_dsize, src_size);
+ return AVERROR_INVALIDDATA;
+ }
+
+ tile_width = FFMIN(c->width - tile_x * c->tile_width, c->tile_width);
+ tile_height = FFMIN(c->height - tile_y * c->tile_height, c->tile_height);
+ awidth = FFALIGN(tile_width, 16);
+ aheight = FFALIGN(tile_height, 16);
+
+ if (els_dsize) {
+ int ret, i, j, k;
+ uint8_t tr_r, tr_g, tr_b, *buf;
+ uint32_t *in;
+ /* ELS decoder initializations */
+ memset(&c->ec, 0, sizeof(c->ec));
+ ff_els_decoder_init(&c->ec.els_ctx, src, els_dsize);
+ epic_hash_init(&c->ec.hash);
+
+ /* decode transparent pixel value */
+ tr_r = ff_els_decode_unsigned(&c->ec.els_ctx, &c->ec.unsigned_rung);
+ tr_g = ff_els_decode_unsigned(&c->ec.els_ctx, &c->ec.unsigned_rung);
+ tr_b = ff_els_decode_unsigned(&c->ec.els_ctx, &c->ec.unsigned_rung);
+ if (c->ec.els_ctx.err != 0) {
+ av_log(avctx, AV_LOG_ERROR,
+ "ePIC: couldn't decode transparency pixel!\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ ret = epic_decode_tile(&c->ec, c->epic_buf, tile_height, tile_width,
+ c->epic_buf_stride);
+
+ epic_free_pixel_cache(&c->ec.hash);
+ ff_els_decoder_uninit(&c->ec.unsigned_rung);
+
+ if (ret) {
+ av_log(avctx, AV_LOG_ERROR,
+ "ePIC: tile decoding failed, frame=%d, tile_x=%d, tile_y=%d\n",
+ avctx->frame_number, tile_x, tile_y);
+ return AVERROR_INVALIDDATA;
+ }
+
+ buf = c->epic_buf;
+ dst = c->framebuf + tile_x * c->tile_width * 3 +
+ tile_y * c->tile_height * c->framebuf_stride;
+
+ for (j = 0; j < tile_height; j++) {
+ uint8_t *out = dst;
+ in = (uint32_t *) buf;
+ for (i = 0; i < tile_width; i++) {
+ out[0] = (in[i] >> R_shift) & 0xFF;
+ out[1] = (in[i] >> G_shift) & 0xFF;
+ out[2] = (in[i] >> B_shift) & 0xFF;
+ out += 3;
+ }
+ buf += c->epic_buf_stride;
+ dst += c->framebuf_stride;
+ }
+
+ if (src_size > els_dsize) {
+ uint8_t *jpg;
+ uint32_t tr;
+ int bstride = FFALIGN(tile_width, 16) >> 3;
+ int nblocks = 0;
+ int estride = c->epic_buf_stride >> 2;
+
+ src += els_dsize;
+ src_size -= els_dsize;
+
+ in = (uint32_t *) c->epic_buf;
+ tr = (tr_r << R_shift) | (tr_g << G_shift) | (tr_b << B_shift);
+
+ memset(c->kempf_flags, 0,
+ (aheight >> 3) * bstride * sizeof(*c->kempf_flags));
+ for (j = 0; j < tile_height; j += 8) {
+ for (i = 0; i < tile_width; i += 8) {
+ c->kempf_flags[(i >> 3) + (j >> 3) * bstride] = 0;
+ for (k = 0; k < 8 * 8; k++) {
+ if (in[i + (k & 7) + (k >> 3) * estride] == tr) {
+ c->kempf_flags[(i >> 3) + (j >> 3) * bstride] = 1;
+ nblocks++;
+ break;
+ }
+ }
+ }
+ in += 8 * estride;
+ }
+
+ memset(c->jpeg_tile, 0, c->tile_stride * aheight);
+ jpg_decode_data(&c->jc, awidth, aheight, src, src_size,
+ c->jpeg_tile, c->tile_stride,
+ c->kempf_flags, bstride, nblocks, c->swapuv);
+
+ in = (uint32_t *) c->epic_buf;
+ dst = c->framebuf + tile_x * c->tile_width * 3 +
+ tile_y * c->tile_height * c->framebuf_stride;
+ jpg = c->jpeg_tile;
+ for (j = 0; j < tile_height; j++) {
+ for (i = 0; i < tile_width; i++)
+ if (in[i] == tr)
+ memcpy(dst + i * 3, jpg + i * 3, 3);
+ in += c->epic_buf_stride >> 2;
+ dst += c->framebuf_stride;
+ jpg += c->tile_stride;
+ }
+ }
+ } else {
+ dst = c->framebuf + tile_x * c->tile_width * 3 +
+ tile_y * c->tile_height * c->framebuf_stride;
+ return jpg_decode_data(&c->jc, tile_width, tile_height, src, src_size,
+ dst, c->framebuf_stride, NULL, 0, 0, c->swapuv);
+ }
+
+ return 0;
+}
+
static int kempf_restore_buf(const uint8_t *src, int len,
uint8_t *dst, int stride,
const uint8_t *jpeg_tile, int tile_stride,
GetBitContext gb;
int i, j, nb, col;
int ret;
+ int align_width = FFALIGN(width, 16);
if ((ret = init_get_bits8(&gb, src, len)) < 0)
return ret;
else
memcpy(dst + i * 3, jpeg_tile + i * 3, 3);
}
+ skip_bits_long(&gb, nb * (align_width - width));
}
return 0;
return AVERROR(ENOMEM);
}
if (!c->synth_tile || !c->jpeg_tile ||
+ (c->compression == 2 && !c->epic_buf_base) ||
c->old_tile_w < c->tile_width ||
c->old_tile_h < c->tile_height) {
- c->tile_stride = FFALIGN(c->tile_width, 16) * 3;
- aligned_height = FFALIGN(c->tile_height, 16);
- av_free(c->synth_tile);
- av_free(c->jpeg_tile);
- av_free(c->kempf_buf);
- av_free(c->kempf_flags);
+ c->tile_stride = FFALIGN(c->tile_width, 16) * 3;
+ c->epic_buf_stride = FFALIGN(c->tile_width * 4, 16);
+ aligned_height = FFALIGN(c->tile_height, 16);
+ av_freep(&c->synth_tile);
+ av_freep(&c->jpeg_tile);
+ av_freep(&c->kempf_buf);
+ av_freep(&c->kempf_flags);
+ av_freep(&c->epic_buf_base);
+ c->epic_buf = NULL;
c->synth_tile = av_mallocz(c->tile_stride * aligned_height);
c->jpeg_tile = av_mallocz(c->tile_stride * aligned_height);
- c->kempf_buf = av_mallocz((c->tile_width + 1) * aligned_height
- + FF_INPUT_BUFFER_PADDING_SIZE);
- c->kempf_flags = av_mallocz( c->tile_width * aligned_height);
+ c->kempf_buf = av_mallocz((c->tile_width + 1) * aligned_height +
+ FF_INPUT_BUFFER_PADDING_SIZE);
+ c->kempf_flags = av_mallocz(c->tile_width * aligned_height);
if (!c->synth_tile || !c->jpeg_tile ||
!c->kempf_buf || !c->kempf_flags)
return AVERROR(ENOMEM);
+ if (c->compression == 2) {
+ c->epic_buf_base = av_mallocz(c->epic_buf_stride * aligned_height + 4);
+ if (!c->epic_buf_base)
+ return AVERROR(ENOMEM);
+ c->epic_buf = c->epic_buf_base + 4;
+ }
}
return 0;
return AVERROR_INVALIDDATA;
}
- if ((magic & 0xF) < 4) {
- av_log(avctx, AV_LOG_ERROR, "G2M2 and G2M3 are not yet supported\n");
- return AVERROR(ENOSYS);
- }
+ c->swapuv = magic == MKBETAG('G', '2', 'M', '2');
while (bytestream2_get_bytes_left(&bc) > 5) {
chunk_size = bytestream2_get_le32(&bc) - 1;
ret = 0;
switch (c->compression) {
case COMPR_EPIC_J_B:
- av_log(avctx, AV_LOG_ERROR,
- "ePIC j-b compression is not implemented yet\n");
- return AVERROR(ENOSYS);
+ ret = epic_jb_decode_tile(c, c->tile_x, c->tile_y,
+ buf + bytestream2_tell(&bc),
+ chunk_size - 2, avctx);
+ break;
case COMPR_KEMPF_J_B:
ret = kempf_decode_tile(c, c->tile_x, c->tile_y,
buf + bytestream2_tell(&bc),
jpg_free_context(&c->jc);
+ av_freep(&c->epic_buf_base);
+ c->epic_buf = NULL;
av_freep(&c->kempf_buf);
av_freep(&c->kempf_flags);
av_freep(&c->synth_tile);
.close = g2m_decode_end,
.decode = g2m_decode_frame,
.capabilities = CODEC_CAP_DR1,
+ .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
};
projects / ffmpeg / blobdiff